Digital Communication: Communication, Multimedia, Security by Christoph Meinel, Harald Sack

By Christoph Meinel, Harald Sack

The authors provide a close precis in regards to the basics and the historic heritage of electronic verbal exchange. This contains an summary of the encoding rules and algorithms of textual info, audio info, in addition to photos, pictures, and video within the net. additionally the basics of desktop networking, electronic safety and cryptography are lined. therefore, the ebook offers a well-founded entry to verbal exchange expertise of computing device networks, the net and the WWW. various images and photographs, a subject-index and a close record of historic personalities together with a word list for every bankruptcy raise the sensible good thing about this publication that's compatible in addition to for undergraduate scholars as for operating practitioners.

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Extra resources for Digital Communication: Communication, Multimedia, Security

Example text

Only since the invention of writing (see Chap. 1) is it possible at all to conserve language and thus to obtain insight into its evolution. But precisely for this reason there is no lack of hypotheses about the history of language. Anatomists attempt to determine the existence of the speech center in the brain using casts of the fossilized remains of the inside of the skull with its impression of the long decayed cerebral cortex. By comparing the different areas of the brain in humans and in primates, neurobiologists seek to discover clues to the language ability of our ancestors, while linguists attempt to reconstruct a “protolanguage“ of all languages and language families known today.

The regular conveyance of messages was inseparable with the expanding traffic and transport systems. Without traffic there was no flow of messages and with traffic there was not only the need to exchange goods over great distances but also the latest news. Even before the Roman Empire’s massive road network system in the European Bronze Age, the so-called Amber Road existed between Italy and Denmark via Austria. In China caravans transported precious goods along the route of the Silk Road, from China’s Middle Kingdom to the West.

Therefore, according to Plato, those who make a written notation are simply too lazy to use their own memory. This complaint against writing, which ironically is only known to us today because it was written down by Plato’s pupil Socrates, reminds us in an amazingly similar way of the complaints by modern media critics about television causing human talents to atrophy. Of course we know today that books don’t think independently nor do they make decisions without us. But the Socratic warning of not placing too much trust in the written word seemed to ring true all too soon in 48 BC.

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